This also has to start with people putting magnifying glasses on the bridge of the nose to say ……
It is said that the world of myopic eyes is a blur, it can be said that 10 meters away from the basic human and animal is indistinguishable, sometimes it does not want to say hello to you, but really can not see ah. Squinting is not disrespectful, but it can only be so!
At present, with the popularity of electronic products, myopia patients are more and more, glasses have become an essential part of our daily life, the first thing to do every day to get up, is the first glasses on the nose!
Glasses can be said to be one of the most beneficial to the general public invention, that glasses in the end how to invent?
The origin of the original has many different opinions
The original spectacles appeared earlier, but there are many different opinions about the place of origin. Some people believe that in the ruins of the ancient city of Nineveh on the east bank of the Tigris River in Western Asia, a crystal lens was unearthed, which is evidence that the ancestors of the Iraqis – the ancient Assyrians and Babylonians as early as more than 2,700 years ago, the use of eyeglasses.
It is also believed that in ancient Greece, a polished crystal was used as spectacles to regulate vision.
It is also documented that a nearsighted Roman emperor used the world’s first monocle made of emeralds in the 1st century A.D. He closed one eye and watched a duel between swordsmen through the jeweled piece in the other eye.
It is also known that spectacles originated in China, where the recognition of refractive errors in the human eye was documented as early as the 7th century. ……
Due to the many and incoherent records, we can’t get the exact place of origin of the primitive spectacles, but what we can know is that at the very beginning, people just used gemstones, crystals, and other materials to alleviate vision problems, and we don’t know much about their principles.
Early invention or magnifying glass
From the 9th to 13th century AD, people made glass into a “reading stone”, which was used to magnify text by placing it on a piece of paper.
It was not until the middle of the 13th century that Roger Bacon, an Englishman, was walking in his garden when he saw, through the raindrops on a spider’s web, that the veins of a leaf had been enlarged so much that he could see the fine hairs on it.
From this, he immediately went home and found a glass ball and placed it in a book, but the figures were still blurred. Following this, he cut a piece of glass out of a diamond and brought it close to the book, and the text was magnified.
Further, he dug a round hole in a piece of wood, fitted it with glass, and mounted a wooden handle. This led to the first magnifying glass, the prototype of the eyeglass.
The first spectacles are born
By the mid to late 13th century, the technology related to the production of magnifying lenses made of crystal stones had matured so much that the conditions for the invention of spectacles were basically in place, and the appearance of magnifying lenses told the world that convex lenses could magnify things, and the first person to think of correcting eyesight with convex lenses was Soweno Degree Amadei, from Italy.
With this idea in mind, Amadi began to study how to turn glass into a curved shape and how to adjust the angle and finally made the glass into the first pair of glasses for farsightedness. He told his invention to a monk named Alessandro Dilla Spina, who later publicized the invention and showed people how to make the glass curved, and since then, spectacles have been used for the benefit of the world.
However, at that time, spectacles were more expensive, and the production technology was not mature enough, only a few rich people, monks, and so on could afford to wear them, so spectacles have not been widely used.
In 1352, in a painting by Tommaso da Modena, there is a man wearing spectacles, from which we can also see that people were already using spectacles on the bridge of their noses to read books and manuscripts.
The popularity of spectacles
It is worth mentioning that the first eyeglasses were made without frames, and people used various methods to fix them: some used bronze frames, which were placed on the temples, some used thin cords to wrap around the ears, or they were simply fixed in a hat, and some people used thin cords to attach a piece of jewelry to hang over the shoulders across the ears.
Until the 16th century, Germany manufactured glasses with bridge connections which later appeared in clip-on frames, but because it extruded the bridge of the nose has not been widely spread.
At the end of the 16th century, El Greco produced the first pair of spectacles with mirror feet. Until then, the basic shape of the glasses was fixed, and after continuous development and improvement, it slowly became what we are familiar with today. It can be said that the creation of frames was a major factor in the popularity of glasses.
In addition to the discomfort of wearing glasses, there are two other reasons why glasses are not widely popular, namely, the grinding technology is not fully developed and the lens material is more expensive.
The grinding technology of the early glasses could not achieve the requirements of smooth surfaces and even curves, and the early lenses were mostly made of crystals, precious stones, and other materials, which were beyond the reach of ordinary people.
In 1954, after French engineers invented resin lenses, the reform of lens materials made glasses come into the civilian family, and this resin material has been used until now.
Grinding techniques were greatly improved in the mid-19th century, with the advent of mechanical grinding equipment that could grind a variety of lenses of different natures and sizes, and in the mid-19th century, lens design changed from flat to biconcave or biconvex lenses.
Eventually, around 1890, the crescent-shaped curvature corrective lenses that we use today appeared. As you can see, the popularity of technology is limited not only by the discovery of the technical principle but also by the manufacturing process, materials, etc.
The family of spectacles is growing
With the development of various technologies, the current family of spectacles has been gradually growing, gradually from practical to practical and decorative dual-purpose or decorative direction, the emergence of contact lenses, protective glasses, sunglasses, VR glasses, and so on.
Glasses with different functions play an important role in people’s lives, work, study, and entertainment as well as physical health, and are indispensable assistants and partners for people.
Modern optical instruments such as telescopes, microscopes, and electron microscopes, which were invented by the extension of the principle of glasses, are also indispensable tools for the progress of science and technology.
The history of the invention and improvement of spectacles reflects the history of human society and civilization, and spectacles will continue to develop and innovate and play an important role in human life.
